Drinking tumbler



FIG. 1 is a front perspective view of a drinking tumbler.

FIG. 2 is a bottom perspective view thereof.

FIG. 3 is a top view thereof.

FIG. 4 is a bottom view thereof.

FIG. 5 is a front view thereof.

FIG. 6 is a top perspective view thereof; and,

FIG. 7 is an exploded view thereof.

The broken lines in the drawing depict portions of the drinking tumblerand form no part of the claimed design.

CLAIM The ornamental design for a drinking tumbler, as shown anddescribed.